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IMPROVEMENT IN HARNBSSTTRBES.

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'lO ALL` WHOM IT MAY ONCERN: I.

Be it known that I, CHARLES M. STURGEsS, of Washington, in the county of Washington', and Stateof Iowa, have invented a new and useful Improvement in Self-Adjusting arnese-Trees; and I do hereby declare that the following is a full, clear, and exact descriptionof the `construction and operation of the same1eference being had to the annexed drawings and letters of reference marked thereon, making part of this specification, in whichi Figure 1 is a two-part nut to which the terret is attached.

Figure 2 is a longitudinal elevation-of one-half of the adjustable tree.

Figure 3 is a sectionalelevation of theY tree `taken through the line X X. Y, ,l

`'lhe nature of my invention consists in the use of a two-part nut, iitted into the pad-'treein such a manner that no opening is required in the under side of the ,pad-tree for inserting the nut. By this arrangement much expense is saved in the construction ofthe pad, for no plate is required to hold/the 11u-t in position. The usual nethcd of' construction is to make an opening Vthrough the back of the pad plate for the purpose of inserting the nut which holds the terret, and then securing a plate over said opening by means of rivets. i When the twop'nrt nut is used, the back plate is not necessary, for the pad plate can be cast so as to receive the nut and hold it in position. By the use of my invention, the shank of a broken terret--on which is made thefscrew-can be removed readily', lwthoutthe usual resort to drilling, or otherwise destroying the pad or pad plate; which is not the case when adjustable trees are used, as now manufactured. l

To enable others skilled in the art to make and use my invention, I will describe its construction and t operation.

A represents the vcommon pad-tree, to which the pad is attached in the'usual manner. E E shows the nnt, which is made in two parts, as seen at fig. 1, and has the nibs G passing under the projections'F," in order that the nut to which the nibs are attached may beheld {irmly in position, and yet allow the yoke to be self-adjusting jte the back of the horse. C shows one-half of the yoke, the lowerend of which is tted over" the upperv part ofthe nut E E, and between the base J of the terret D and the projections F on the pad plate, by which means it is held in position for use and adjustment. I is the shank of the terret as inserted vin the nut E E, A

as seen at iig. 3, and can be easily removed when broken off at the hase J. The whole` arrangement, except the two-part nut E E, is similar to the common adjustable tree now in u'se, and is intended to answer the same purpose.

, peraton.

No skill is required `in the use of my invention 'except inserting the nut E E, which can be put in the padtree A by moving the parts E past each other, as seen by the planview W, and then adjust them in position for receiving the screw I, as seen at tig. 1. g

4 Having thus fully described my device, I do not claim the parts C D A, but what I do claim, and desire to secure by Letters Patent of the United States, is r The combi-nation of the two-.part-nut E E, pad-tree A, and yoke C, substantially as and for the purpose set forth I l o. M. s'rURGEss. A

Witnesses:

Gno. L. CHAPIN, A. HArwAnn. 

